Additionally these are the open source utility libs that I
created to while developing the server:
google cloud messaging helper lib:
https://github.com/Extrawurst/gcm-d
sockjs long polling implementation based on vibe.d:
https://github.com/Extrawurst/sockjs-d
tool to keep the server running no matter what:
https://github.com/Extrawurst/forever-d
simple elo calculation:
https://github.com/Extrawurst/elo-rating-d
XTEA (Extended Tiny Encryption Algorithm) Implemenation in D:
https://github.com/Extrawurst/xtea-d
